A challenging project....1500va toroidal power

[Alexontherocks]

Ok....

I modified the relay board as follows:

100k log pot 2 channels to simultaneously vary resistor value

4700uf 63v cap instead of 220uf cap

The result is I can vary charging time of the cap and for now fixed it at 23secs (it should be enough for the NTCs to warm up, correct?)

pic of the board. Obviously the position is not definitive.

I followed Andrew's advice and experimented.





P.s. you can see where the holes have been drilled for the resistor/thermistor. As soon as the ntcs arrive I will be ready to fire up....also by then I will have cut down on the number of capacitors to something like 600000uf or less.

I will reuse the spraque caps for a small valve amplifier (Intrigued by valves....) since they are 200v caps